A pipe aqueduct (the Wissahickon aqueduct), Philadelphia, Pennsylvania. Photograph, ca. 1880. https://www.rawpixel.com/image/14007356/photo-image-cloud-plant-personFree Image from public domain licenseGezicht op het dorp Meissen en het kasteel Albrechtsburg (1700 - 1799) by Basset and anonymous https://www.rawpixel.com/image/13762670/image-paper-cartoon-frameFree Image from public domain licenseIllustrations of China and its people : a series of two hundred photographs, with letterpress descriptive of the places and… https://www.rawpixel.com/image/13987672/photo-image-plant-person-skyFree Image from public domain licenseLondon and Birmingham Railway: the viaduct over the River Avon at Wolston, Warwickshire. Tinted lithograph by J.C. Bourne… https://www.rawpixel.com/image/14017057/image-plant-tree-skyFree Image from public domain licenseRuïne van de grote moskee van de Omajjaden, Baalbek (c. 1867 - c. 1877) by Félix Bonfils https://www.rawpixel.com/image/13751284/photo-image-paper-person-public-domainFree Image from public domain licenseRoman aqueduct, Merida, near Badajoz, Spain. Photograph Foto Aida, 1910/1936. https://www.rawpixel.com/image/14016973/roman-aqueduct-merida-near-badajoz-spain-photograph-foto-aida-19101936Free Image from public domain licenseHunting: a man stalking partridges (top), a trap for catching ground-feeding birds. Engraving, c.1762 by Defehrt after L.J.… https://www.rawpixel.com/image/13983686/image-cartoon-plant-personFree Image from public domain license[Untitled photo, possibly related to: Toll bridge over Mississippi River, Saint Louis, Missouri]. Sourced from the Library… https://www.rawpixel.com/image/12253561/photo-image-sky-public-domain-basketballFree Image from public domain license